WASHINGTON – Any senator can force a floor vote to block a U.S. foreign military sale. But when Sen. Rand Paul, R-Ky., did just that last year in a failed bid to halt President Joe Biden’s $650 million sale of AIM-120 air-to-air missiles to Saudi Arabia, barely half of the Democratic caucus joined him. Sen. Richard Blumenthal, D-Conn., was among the Democrats who sided with Biden and voted against Paul’s resolution, which failed 30-67. Now Blumenthal is taking the lead on one of numerous